add drivers and interface and task classes

src/SsdInterface.cpp

@@ -0,0 +1,30 @@
+
+#include "SsdInterface.hpp"
+
+SsdInterface::SsdInterface(const uint8_t dataPin, const uint8_t clockPin, const uint8_t latchPin, size_t numDigits) : numDigits_(numDigits) {
+
+    // create device
+    static ssd_595_t dev = { (gpio_num_t)dataPin, (gpio_num_t)clockPin, (gpio_num_t)latchPin };
+    device_ = &dev;
+
+}
+
+STATUS SsdInterface::writeRaw(uint8_t* bytes, size_t numBytes) {
+    shiftBytes(device_, bytes, numBytes);
+    return OKAY;
+}
+
+STATUS SsdInterface::write10(int32_t value) {
+    // TODO: implement
+    return NOT_IMPLEMENTED;
+}
+
+STATUS SsdInterface::write16(int32_t value) {
+    // TODO: implement
+    return NOT_IMPLEMENTED;
+}
+
+STATUS SsdInterface::get(uint8_t* bytes) {
+    // TODO: implement
+    return NOT_IMPLEMENTED;
+}